JEE Main 2020 · ChemistryMultiple choiceSingle correctEasyRecall

JEE Main 6 September 2020, Shift 2, Chemistry Q34

Question 34 of 75 in this shift, Chemistry question 9 of 25.

Dihydrogen of high purity (

>99.95\%

) is obtained through :

(1)the electrolysis of acidified water using Pt electrodes.
(2)the electrolysis of brine solution.
(3)the reaction of Zn with dilute HCl.
(4)the electrolysis of warm $\mathrm{Ba(OH)_2}$ solution using Ni electrodes.Official answer

Official answer

Option 4

NTA final key (Sep 2020).

Chapter: Hydrogen
Topic: Hydrogen and Hydrides
Idea tested: High Purity Dihydrogen Preparation

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Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 42 of the 174 JEE Main shifts held from 2017 to 2026.